Phosphate test kits - Page 2

anthonys51 · 01/29/2017, 06:16 PM

Thanks. This is my first real try with Macro algae. I was under the assumption that it lowered nitrates and phosphates equally. I now know I am incorrect

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nicholasb · 01/29/2017, 06:27 PM

Macro algae will eat more nitrates than phosphates. If you took out the macro algae, it likely that the natural denitrifying bacteria will take up the excess nitrate.

anthonys51 · 01/29/2017, 06:41 PM

East ?

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nicholasb · 01/29/2017, 07:05 PM

eat

anthonys51 · 01/29/2017, 07:13 PM

Oh I was under the assumption they use more nitrogen ( nitrates) then phosphates.

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nicholasb · 01/29/2017, 07:20 PM

Your are right. It is late and I am half asleep.

anthonys51 · 01/29/2017, 07:27 PM

Oh your in England I was going to say 830 isn't that late

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nicholasb · 01/29/2017, 07:28 PM

Correct!!!!.

anthonys51 · 01/29/2017, 07:31 PM

I would of though phosphates that high in a 2 month old tank with lots of dry rock would be teaming with algae. But maybe dosing iron helped me maybe my 4 tangs and cuc kept it in check. Either way just texted .10. So hopefully a few more days it will be down to levels I want

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anthonys51 · 01/29/2017, 07:37 PM

Think I just read that 25 grams of algae taken out of A 67 gallon tank would reduce phosphate.10 ppm while reducing nitrates 10ppm

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bertoni · 01/29/2017, 09:49 PM

Sometimes, dosing iron seems to help macro algae. That doesn't happen all the time, though. It's certainly safe to dose and reasonable to try.

anthonys51 · 01/29/2017, 10:56 PM

Thanks. If it can't hurt why not try it

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Martin Kuhn · 01/29/2017, 11:50 PM

Phosphate is maybe THE test kit where a lot of scrap is sold.
Besides estimating which one of yours is correct (maybe both aren't...) you should purchase a reference solution with "exactly known po4 value" .... could just cost some $.....

Measure this solution instead of your water and decide which of the kits is closer to the known value.
If both are far off .... get another / better test kit and repeat.
The best ones are reef-Analytics and Rowa's kits

Or, Maybe you do something wrong whilst measuring. .... so you learn how to measure / read the result better

Then, you calculate the correction factor for this measurement kit.
EG
Ref.solution 0,03 ppm
You tested 0,025 ppm

0,03 / 0,025 -> 1,2

Then measure your tanks water and multiply the result x 1,2 -> your tanks po4 value

If this factor is <0,5. or > 1,5 I wouldn't trust the test kit

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anthonys51 · 01/29/2017, 11:57 PM

Who do you find water with a know po4 solution. I was also looking into finding water with a know alk level. I know these are hobby grade test kits so you can never be 100 percent sure they are right

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bertoni · 01/30/2017, 06:15 PM

I haven't found any reasonably-priced saltwater check solutions. Hanna sells a solution that might provide a fairly reasonable test of the Phosphate Checker, but it's primarily a freshwater solution, and I wouldn't use it on the Phosphorus ULR.

anthonys51 · 01/30/2017, 06:39 PM

Quote:

Originally Posted by bertoni

I haven't found any reasonably-priced saltwater check solutions. Hanna sells a solution that might provide a fairly reasonable test of the Phosphate Checker, but it's primarily a freshwater solution, and I wouldn't use it on the Phosphorus ULR.

Have you found one for alk. My friend tests his tank with Hanna gets 8.9 with salifert he gets 7.9. Both are acceptable range. But he was wondering witch one is correct. Told him only god knows

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bertoni · 01/30/2017, 07:17 PM

It's possible to make a test solution for the Salifert, but I don't think it'd work at all for the Hanna. I don't know of a solution that is reasonably cost-effective and would work. Saltwater standards are available, but pricey.

anthonys51 · 01/30/2017, 07:28 PM

Ok thanks

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Martin Kuhn · 02/01/2017, 05:36 AM

http://www.bulkreefsupply.com/fauna-...-solution.html

http://www.reefanalytics.com/Wassert...0-ml::229.html

http://www.aac-online.co.uk/salts-ba...libration.html

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anthonys51 · 02/02/2017, 09:50 AM

Question I think it's ready to be change but want your opinion. Jan 18 test 2.00 ppm. Added 6 cups of Gfo Jan 19 tested jan 26 test .81. Tested today .65. Should I can Gfo

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Vinny Kreyling · 02/02/2017, 10:13 AM

Anthony,
Check the water coming out of the reactor to see the difference between it & tank water.
That will tell you if it is still working. Looks OK to me.
6 cups is a lot of GFO.

anthonys51 · 02/02/2017, 10:41 AM

6 cups is a lot of GFO.[/QUOTE]

Yes I am hearing this a lot. Its might of been only 5. I didn't fill the cup all the way it was a 1 cup measuring cup

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tmz · 02/02/2017, 10:42 AM

I'm not sure what your levels are given the test variations noted. Don't know which is correct and have no experience with whatever Milwaukee test you are using. Salifert seemed accurate to me in the higher ranges when I cross checked with a hanah colorimeter several times a while back .

I agree go slow with the gfo or other removers if you continue to use it .. Phosphate is vital to living things for a number of functions including it's effects on calcification and others. Sharp quick reductions seem to cause coral stress reactions like paling particualry at lower ranges.

Since you are growing macro algae I wouldn't drop the PO4 much below .05ppm to .1ppm and I'd move cautiously form your current .8 which might also be fine as is for your tank.

10 ppm NO3 might be ok but I prefer it lower. NSW runs around 0.2ppm.

Dosing iron will not discourage nuisance algae ; probably will encourage it along with the macros.

anthonys51 · 02/02/2017, 10:49 AM

Quote:

Originally Posted by tmz

I'm not sure what your levels are given the test variations noted. Don't know which is correct and have no experience with whatever Milwaukee test you are using. Salifert seemed accurate to me in the higher ranges when I cross checked with a hanah colorimeter several times a while back .

I agree go slow with the gfo or other removers if you continue to use it .. Phosphate is vital to living things for a number of functions including it's effects on calcification and others. Sharp quick reductions seem to cause coral stress reactions like paling particualry at lower ranges.

Since you are growing macro algae I wouldn't drop the PO4 much below .05ppm to .1ppm and I'd move cautiously form your current .8 which might also be fine as is for your tank.

10 ppm NO3 might be ok but I prefer it lower. NSW runs around 0.2ppm.

Dosing iron will not discourage nuisance algae ; probably will encourage it along with the macros.

Thanks will leave current Gfo in. And when I do add more won't add so much. That seems to be a mistake. Although luckily no corals are showing any signs of stress. But I think I got lucky in-spite of me I should of know better thanks all

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Vinny Kreyling · 02/02/2017, 11:23 AM

Talk to me tomorrow night.

01/29/2017, 06:27 PM	#27
nicholasb Registered Member Join Date: Mar 2014 Location: south west england Posts: 292	Macro algae will eat more nitrates than phosphates. If you took out the macro algae, it likely that the natural denitrifying bacteria will take up the excess nitrate. Last edited by nicholasb; 01/29/2017 at 07:19 PM.

01/29/2017, 09:49 PM	#36
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	Sometimes, dosing iron seems to help macro algae. That doesn't happen all the time, though. It's certainly safe to dose and reasonable to try. __________________ Jonathan Bertoni

01/29/2017, 11:50 PM	#38
Martin Kuhn Registered Member Join Date: Feb 2006 Location: Munich, Germany Posts: 199	Phosphate is maybe THE test kit where a lot of scrap is sold. Besides estimating which one of yours is correct (maybe both aren't...) you should purchase a reference solution with "exactly known po4 value" .... could just cost some $..... Measure this solution instead of your water and decide which of the kits is closer to the known value. If both are far off .... get another / better test kit and repeat. The best ones are reef-Analytics and Rowa's kits Or, Maybe you do something wrong whilst measuring. .... so you learn how to measure / read the result better Then, you calculate the correction factor for this measurement kit. EG Ref.solution 0,03 ppm You tested 0,025 ppm 0,03 / 0,025 -> 1,2 Then measure your tanks water and multiply the result x 1,2 -> your tanks po4 value If this factor is <0,5. or > 1,5 I wouldn't trust the test kit Gesendet von iPhone mit Tapatalk __________________ www.aquacalculator.com ...reference for reefers

01/30/2017, 06:15 PM	#40
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	I haven't found any reasonably-priced saltwater check solutions. Hanna sells a solution that might provide a fairly reasonable test of the Phosphate Checker, but it's primarily a freshwater solution, and I wouldn't use it on the Phosphorus ULR. __________________ Jonathan Bertoni

01/30/2017, 07:17 PM	#42
bertoni RC Mod Join Date: Mar 2002 Location: Mountain View, CA, USA Posts: 88,616	It's possible to make a test solution for the Salifert, but I don't think it'd work at all for the Hanna. I don't know of a solution that is reasonably cost-effective and would work. Saltwater standards are available, but pricey. __________________ Jonathan Bertoni

01/29/2017, 06:16 PM	#26
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	Thanks. This is my first real try with Macro algae. I was under the assumption that it lowered nitrates and phosphates equally. I now know I am incorrect Sent from my iPhone using Tapatalk

01/29/2017, 06:41 PM	#28
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	East ? Sent from my iPhone using Tapatalk

01/29/2017, 07:05 PM	#29
nicholasb Registered Member Join Date: Mar 2014 Location: south west england Posts: 292	eat

01/29/2017, 07:13 PM	#30
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	Oh I was under the assumption they use more nitrogen ( nitrates) then phosphates. Sent from my iPhone using Tapatalk

01/29/2017, 07:20 PM	#31
nicholasb Registered Member Join Date: Mar 2014 Location: south west england Posts: 292	Your are right. It is late and I am half asleep.

01/29/2017, 07:27 PM	#32
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	Oh your in England I was going to say 830 isn't that late Sent from my iPhone using Tapatalk

01/29/2017, 07:28 PM	#33
nicholasb Registered Member Join Date: Mar 2014 Location: south west england Posts: 292	Correct!!!!.

01/29/2017, 07:31 PM	#34
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	I would of though phosphates that high in a 2 month old tank with lots of dry rock would be teaming with algae. But maybe dosing iron helped me maybe my 4 tangs and cuc kept it in check. Either way just texted .10. So hopefully a few more days it will be down to levels I want Sent from my iPhone using Tapatalk

01/29/2017, 07:37 PM	#35
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	Think I just read that 25 grams of algae taken out of A 67 gallon tank would reduce phosphate.10 ppm while reducing nitrates 10ppm Sent from my iPhone using Tapatalk

01/29/2017, 10:56 PM	#37
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	Thanks. If it can't hurt why not try it Sent from my iPhone using Tapatalk

01/29/2017, 11:57 PM	#39
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	Who do you find water with a know po4 solution. I was also looking into finding water with a know alk level. I know these are hobby grade test kits so you can never be 100 percent sure they are right Sent from my iPhone using Tapatalk

01/30/2017, 07:28 PM	#43
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	Ok thanks Sent from my iPhone using Tapatalk

02/01/2017, 05:36 AM	#44
Martin Kuhn Registered Member Join Date: Feb 2006 Location: Munich, Germany Posts: 199	http://www.bulkreefsupply.com/fauna-...-solution.html http://www.reefanalytics.com/Wassert...0-ml::229.html http://www.aac-online.co.uk/salts-ba...libration.html Gesendet von iPhone mit Tapatalk __________________ www.aquacalculator.com ...reference for reefers

02/02/2017, 09:50 AM	#45
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	Question I think it's ready to be change but want your opinion. Jan 18 test 2.00 ppm. Added 6 cups of Gfo Jan 19 tested jan 26 test .81. Tested today .65. Should I can Gfo Sent from my iPhone using Tapatalk

02/02/2017, 10:13 AM	#46
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Anthony, Check the water coming out of the reactor to see the difference between it & tank water. That will tell you if it is still working. Looks OK to me. 6 cups is a lot of GFO. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.

02/02/2017, 10:41 AM	#47
anthonys51 Registered Member. Join Date: Nov 2008 Location: Kings Park, NY Posts: 2,789	6 cups is a lot of GFO.[/QUOTE] Yes I am hearing this a lot. Its might of been only 5. I didn't fill the cup all the way it was a 1 cup measuring cup Sent from my iPhone using Tapatalk

02/02/2017, 10:42 AM	#48
tmz ReefKeeping Mag staff Join Date: Apr 2006 Location: West Seneca NY Posts: 27,691	I'm not sure what your levels are given the test variations noted. Don't know which is correct and have no experience with whatever Milwaukee test you are using. Salifert seemed accurate to me in the higher ranges when I cross checked with a hanah colorimeter several times a while back . I agree go slow with the gfo or other removers if you continue to use it .. Phosphate is vital to living things for a number of functions including it's effects on calcification and others. Sharp quick reductions seem to cause coral stress reactions like paling particualry at lower ranges. Since you are growing macro algae I wouldn't drop the PO4 much below .05ppm to .1ppm and I'd move cautiously form your current .8 which might also be fine as is for your tank. 10 ppm NO3 might be ok but I prefer it lower. NSW runs around 0.2ppm. Dosing iron will not discourage nuisance algae ; probably will encourage it along with the macros. __________________ Tom Current Tank Info: Tank of the Month , November 2011 : 600gal integrated system: 3 display tanks (120 g, 90g, 89g),several frag/grow out tanks, macroalgae refugia, cryptic zones. 40+ fish, seahorses, sps,lps,leathers, zoanthidae and non photosynthetic corals.

02/02/2017, 11:23 AM	#50
Vinny Kreyling Registered Member Join Date: Nov 2002 Location: Miller Place, NY Posts: 7,206	Talk to me tomorrow night. __________________ 250 gallon mixed reef, 2 Reefbreeder's Photon V 2, Deepwater BLDC 12, DAS EX-3 Skimmer, MTC mini cal, 2-3/4" Sea Swirls, Aquacontroller & 6 Tunze pumps.